Furnace Repair Cost (2026)
By the Home Repair One data team · Updated July 2026 · Ranges from our estimator engine
Short answer: In 2026, a typical furnace repair visit runs about $400–$600 for diagnosis plus a common fix such as an ignitor, flame sensor, or capacitor. That band is the engine's national range for a standard repair call, not a heat-exchanger replacement. A cracked heat exchanger is a carbon-monoxide safety issue and usually means a new furnace, not a $500 part swap. After-hours no-heat calls in deep winter cost more than a scheduled weekday visit.
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What a standard furnace repair visit costs
Most winter service calls are diagnosis plus a failed wear part. Here is the 2026 national range from our cost model. Your ZIP and whether this is an emergency visit tune it in the estimator.
| Scope | Typical range |
|---|---|
| Furnace repair | $400–$600 |
Blowing cold, or not turning on
A dirty flame sensor, a failed ignitor, a tripped safety switch, or a thermostat problem are the usual suspects. A licensed tech should tell you which it is, and the repair price, before they start. With gas, they also have to rule out a cracked heat exchanger.
When it is dangerous
A smell of gas, soot, or a carbon-monoxide alarm means shut the furnace off and call. Working CO detectors are not optional. A cracked heat exchanger is not a repair we will dress up as a cheap part. Replacement math lives on the HVAC cost guide.
What changes your price
- The failed part, an ignitor or flame sensor is cheap, a heat exchanger is not.
- Gas versus electric, and the carbon-monoxide safety check.
- Blower motor, control board, or thermostat faults.
- Emergency or after-hours service in deep winter.
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FAQ
How much does furnace repair cost?
A typical licensed visit runs about $400–$600 for diagnosis and a common part. A cracked heat exchanger is a safety issue that usually means replacement, not a small repair.
Why is my furnace blowing cold air or not turning on?
A dirty flame sensor, a failed ignitor, a tripped safety switch, or a thermostat problem are common. A tech diagnoses safely and rules out a cracked heat exchanger for carbon-monoxide safety.
Is a furnace problem dangerous?
It can be. Gas furnaces can leak carbon monoxide from a cracked heat exchanger. Any smell of gas, soot, or a CO alarm means shut it off and call a pro.